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SWITCH.

APPLICATION FILED SEPT. 6. 1910.

1 ,229,489 Patented June 12, 1917.

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APPLICAT o 1,229,489. Patented June 12, 1917.

3 EEEEEEEEEEEE 2- I 25 L 1 "50 A UNITED STATES PATENT oFnIoE.

ALEXANDER J. LOGUIN, OF WEST ALLIS, WISCONSIN, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO ALLIS-CHALMERS MANUFACTURING DELAWARE.

COMPANY, A CORPORATION OF SWITCH.

Specification of Letters Patent. Patented June 12, 191 7.

Application filed September 6, 1910. Serial No. 580,522.

- exact specification.

This invention relates to electric switches or circuit breakers, and especially to automatically-operated switches to be used in systems of remote control of motors or other translating devices.

The object of this invention is to provide a simple, compact and inexpensive switch which is durable in construction and reliable in operation. The invention embodies novel features for increasing the effectiveness of switches.

The various novel features of my invention will be described in the specification and particularly set forth in the appended claims.

My invention is illustrated on the accompanying sheets of drawings, in which F igure 1 is a side elevation of a switch embodying my invention, the switch being in closed position;

Fig. 2 is a front elevation of the same; Fig. 3 is a side elevation of the same switch as shown in Fig. 1 in open position;

Fig. 4 is a-detail view of the switch magnet structure; and,

Fig. 5 is a side elevation of a switch embodying a modification of my invention.

Mounted upon any suitable base 10 and secured thereto by bolts 11 is a support 12 for a core 13, which is preferably laminated and U-shaped. Surrounding this core 13, which has beveled faces 14, 1s anactuating coil 15. This horizontally-arranged magnet, which comprises the core 13 and coil 15, is adapted to attract a switch actuating member16, which is pivotally mounted to the support 12 at the point 13. One of the ends 17 of the switch actuating member is adapted to engage a stop 18 formed integrally with the support 12 for the purpose of limiting the movement in one direction of the switch actuating member. Secured to the switch actuating member by any suitable means,

such as rivets 19, is a laminated armature which is also provided with beveled faces 201 to correspond to and coiiperate with the beveled faces 14 of the magnetic core 13, the beveled faces of the core and armature being arlanged to-overlap at all times. By providing the core and armature with beveled faces, as shown particularly in Fig. 4, a minimum air gap is obtained thereby providing a structure in which there is anincreased flux between the core and armature for the same amount of exciting current generally required. This is of particular advantage in view of the factthat otherwise there would be a large leakage flux and that a relatively large current would be required to draw the switch actuating member towa rd the magnet. By means of this arrangement the efficiency of the switch is materially increased. Attention is also called to the fact that by having the switch actuated member 16 pivoted comparatively. remote from the armature a large moment is obtained. This switch is therefore one having a large moment and a magnetic structure having a core and armature between which there is a small air gap, these two features being desirable in the operation of switches.

Mounted on the other end of the switch actuating member 16 is a main circuit brush 20 and also an auxiliary contact member 21 which are arranged to cooperate with contact members 22 and 23 respectively. These contact members 22 and 23 are supported by a member 24,-which is pivotally mounted in a support 25. This contact carrying member 24 is arranged to rotate about its pivotal point 26 when, due to the action of the switch actuating member 16, the auxiliary contact 21 engages and slides upon its cotipcrating contact v23, thus forcing'upwardly the contact member 22 into engagement with the brush 20. It is to be noted that the auxiliary contacts, which are in a circuit of high resistance, first engage each other, then the main contacts, which are in a circuit of low contact member 21 engages its cooperating flectors can be removed and replaced readily.

contact 23 more forcefully thus creating a greater pressure between the contact member 22 and its cooperating contact brush 20. As indicated in the drawings, the general arrangement of the cooperative contacts and their supports is such as causes the pressure between the arcing contacts 21, 23 to shift the main contact 22 fully into the path of the contact 20 and to cause a wiping action and firm engagement between these contacts, the power applied to the auxiliary contact 23 being multiplied at the main contact 22, due to the arrangement of the lever arms, insuring an efficient engagement between the main contacts. In other words the reaction of the engaging auxiliary contacts is taken up by an-increase in pressure between the main contacts. The contact member 21'is held between aws and 46 respectively, the latter of which is pivotally mounted in the switch actuating member 16, and is held into engagement with the contact 21 by the use of a spring 47. One part 48 of the horn are deflector 49 is also clamped between the jaws 45 and 46 with the contact 21. By means of this arrangement the contact and are de- The contact-carrying member 24 is rotated against the action of a spring 27, one end of which engages the contact-carrying member 24 and the other end of which engages the support 25,which is secured to the base 10 by bolts 29. Also mounted upon the support 25 are socket contacts 30, which receive the knife-blade contacts 31 'forming terminals of the coil of a blow-out magnet 32. This blow-out magnet is provided with the usual poles 33 and 34, which are so located relatively to the auxiliary contact members that arcs formed by the breaking of the circuit will be destroyed.

Referring particularly to the connections of the switch, it will be seen that current is led in from the positive terminal 35 passes through the coil of the blow-out magnet 32, support 253 conductor 36, which connects said support with one of the auxiliary contacts 23, through contact 21, switch actuating member 16, and through conductor 37 which member 16 to the negative terminal 38. The circuit branches at the point where conductor 36 joins the auxiliary contact 23, and part of the current passes through the pivotal ly mounted contact supporting member 24. contact 22, brush 20, conductor 37 and negative terminal 38. I

In the single modification of this invention shown in Fig. 5, it is to be noted that the.

of my invention.

l/Vhat I claim as new is: I

1. In a switch, a movable member carrying a contact, a pivoted element carrying a contact. engageable with the contact carried by said movable member, and means comprising parts associated with said movable member and said pivoted element for causing movement of the contact carried by said pivoted element prior to engagement between said contacts.

2. In a switch, a member movable about a pivot, and carrying a contact, a pivoted element carrying a contact cooperative with said first mentioned contact, and a part associated with said movable member and cooperative with a part associated with said pivoted element to cause movement of the contact carried by said pivoted element'prior to engagement between said contacts.

3. In a switch, a movable member carrying a contact, a pivoted element carrying a contact cooperative with said first contact, and a part associated with said movable member and cooperative with a. portion of said pivoted element on the side of the pivotal point thereof opposite to that on which the contact carried thereby is disposed and engageable with such portion of said pivoted element prior to the engagement of said contacts for causing positiv movement of the contact carried by said pivoted element into engagement with said first contact.

4. In a switch, a movable member carrying main and auxiliary contacts, a pivoted element carrying main and auxiliary contacts cooperative with said first contacts, the auxiliary contact on said pivoted member being disposed on the opposite side of the pivotal point thereof from the. main contact carried thereby, said auxiliary contacts being engageable prior to engagement of said main contacts and being GfIGCtlWZ to cause an increase in the pressure with which said main contacts engage.

5. In a switch, a movable member, main and auxiliary contacts carried by said movable member, a pivoted element, and contacts mounted on said pivoted element at different distances from the pivotal point thereof and cooperative with the contacts carried by said movable member, the pressure between said auxiliary contacts when in closed position affecting the pressure with which the mam contacts engage each other.

6. In combination, a movable member, a

plurality of contacts carried by said member, and a member pivotally-mounted intermediate its ends and carrying contacts adapted to engage with said first contacts, the contacts on said pivotally-mounted member being disposed on opposite sides of the pivotal point of said member and at different distances from said pivotal point.

7. In a switch, a movable member, a plurality of contacts carried by said member, a plurality of relatively stationary contacts successively engageable with the contacts carried by said movable member, and a movable supporting element on which said relatively stationary contacts are mounted and effective to cause the engagement pressure between one pair of mutually engageable contacts to be dependent upon the engagement pressure between a pair of said contacts previouslybrought into engagement.

8. In a switch, a movable member, main and auxiliary contacts carried by said member and movable into and out of operative position thereby, a second set of main and auxiliary contacts engageable with the main and auxiliary contacts, respectively, carried by said movable member, and a movable element 011 which said second set of main and auxiliary contacts are mounted, said element being normally biased to one position and being movable by said movable member through cooperation of the auxiliary contact on said member with the auxiliary contact on said element to cause the main contact on said element to move toward engagement with the main contact on said movable member.

9. In a switch, a movable member having main and auxiliary contacts, and a pivoted member having cooperating main and auxiliary contacts, the latter main and auxiliary contacts being mounted on opposite sides of the pivotal point of said pivoted member, whereby the pressure between the auxiliary contacts forcesthe main contacts into secure engagement as said movable member moves to switch-closed position.

Y 10. In a switch, a movable member having main and auxiliary contacts, a pivoted member bearing cooperating main and auxiliary contactson opposite sides of its pivotal point and at different distances from said pivotal point, whereby as said movable member moves to switch-closed position the pressure between one pair of contacts varies the pressure between the other pair of contacts. a

11. In a switch, a movable member carrying a contact, a pivoted element carrying a contact engageable with said first contact and normally held out of a position wherein it effectively engages said first contact, and means rendered operative on actuation of said movable member to switch-closed position for shifting the contact carried by said pivoted element into effective engagement with said first contact.

12. In a switch, the combination of two cooperative relatively movable contacts, a pivoted lever on which one of said contacts is mounted, and means associated with the other of said contacts and cooperative with a portion of said lever removed from the contact mounted thereon prior to engagement of said contacts for swinging said lever about its pivot during the last part of the relative movement between said contacts.

13. In a switch, the combination of a movable switch arm provided with a contact, the contact face of said contact being at an angle to the plane of movement of said contact, a pivoted lever, a, contact carried thereby and engageable with said first contact, means on said switch arm for swinging said pivoted lever toward the end of the closing movement of the switch arm to bring the face of the contact on the pivoted 'lever into engagement with that of the contact on the switch arm, the latter part of the closing movement of said first contact being substantially parallel to the engaging face of the contact carried by said pivoted lever.

14. In a switch, the combination of a movable switch arm provided with main and auxiliary contacts, a pivoted lever, main and auxiliary contacts carried thereby and cooperatively engageable with the main and auxiliary contacts carried by said switch arm, said auxiliary contacts being engaget able prior to engagement between said main contacts and being operative to swing said pivoted lever toward the end of the closing movement of said switch arm to bring the face of the main contact on the pivoted lever into engagement with the main contact on the switch arm, the final movement of the main contact carried by the switch arm being substantially parallel to the plane of engagement of said main contacts.

15. In a switch, the combination of a movable switch arm provided with a contact, a pivoted lover, a contact carried thereby and engageable with said first contact, means on said switch arm for swinging said pivoted lever toward the end of the closing movement of the switch arm 'to bring the face of the contact on said pivoted lever toward engagement with the contact carried by said switch arm and to cause the latter part of the closing movement of one of said contacts to be substantially parallel to its engaging face to thereby effect a wiping action between said contacts.

16. In a switch, the combination of two cooperative relatively movable contacts, a pivoted lever on which one of said-contacts is mounted, a support for the other of said contacts, and means associated with the support for said latter contact and cooperative with a portion of said lever prior to engagement of said contacts for swinging said 1ever about its pivot during only the last part of the relative movement of closure between said contacts and thereby moving the contact carried by said lever into engagement with the other of said contacts.

Milwaukee, Wisconsin, August 31 1910.

In testimony whereof I afiix my signature, in the presence of two Witnesses;

CHAS. L. BYRON, Ron. E. STOLL. 

